fixed templates and map binary to file.

Author: HugoMario

src/main/java/io/swagger/codegen/v3/generators/go/AbstractGoCodegen.java

@@ -92,7 +92,7 @@ public AbstractGoCodegen() {
         typeMapping.put("file", "*os.File");
         // map binary to string as a workaround
         // the correct solution is to use []byte
-        typeMapping.put("binary", "string");
+        typeMapping.put("binary", "*os.File");
         typeMapping.put("ByteArray", "string");
         typeMapping.put("object", "interface{}");
         typeMapping.put("UUID", "string");
@@ -255,7 +255,7 @@ public String getTypeDeclaration(Schema schema) {
                 } else {
                     prefix = SchemaHandler.ANY_OF_PREFFIX;
                 }
-                return "[]" + toModelName(prefix + schema.getExtensions().get("x-schema-name")) + SchemaHandler.ARRAY_ITEMS_SUFFIX;
+                return "[]" + toModelName(prefix + schema.getExtensions().remove("x-schema-name")) + SchemaHandler.ARRAY_ITEMS_SUFFIX;
             } else {
                 return "[]" + getTypeDeclaration(inner);
             }

src/main/resources/handlebars/go/api.mustache

@@ -34,8 +34,22 @@ type {{classname}}Service service
 */
 {{#hasOptionalParams}}
 
-type {{{classname}}}{{{nickname}}}Opts struct { {{#parameters}}{{^required}}
-{{#isPrimitiveType}}	{{vendorExtensions.x-exportParamName}} optional.{{vendorExtensions.x-optionalDataType}}{{/isPrimitiveType}}{{^isPrimitiveType}}	{{vendorExtensions.x-exportParamName}} optional.Interface{{/isPrimitiveType}}{{/required}}{{/parameters}}
+type {{{classname}}}{{{nickname}}}Opts struct {
+{{#parameters}}
+{{^required}}
+{{#isPrimitiveType}}
+{{#isFile}}
+    {{vendorExtensions.x-exportParamName}} optional.Interface
+{{/isFile}}
+{{^isFile}}
+    {{vendorExtensions.x-exportParamName}} optional.{{vendorExtensions.x-optionalDataType}}
+{{/isFile}}
+{{/isPrimitiveType}}
+{{^isPrimitiveType}}
+    {{vendorExtensions.x-exportParamName}} optional.Interface
+{{/isPrimitiveType}}
+{{/required}}
+{{/parameters}}
 }
 
 {{/hasOptionalParams}}

src/main/resources/handlebars/go/model.mustache

@@ -1,10 +1,16 @@
 {{>partial_header}}
 package {{packageName}}
-{{#models}}{{#imports}}
-import ({{/imports}}{{#imports}}
-	"{{import}}"{{/imports}}{{#imports}}
+{{#models}}
+{{#imports}}
+{{#@first}}
+import (
+{{/@first}}
+	"{{import}}"
+{{#@last}}
 )
-{{/imports}}{{#model}}{{#isEnum}}{{#description}}// {{{classname}}} : {{{description}}}{{/description}}
+{{/@last}}
+{{/imports}}
+{{#model}}{{#isEnum}}{{#description}}// {{{classname}}} : {{{description}}}{{/description}}
 type {{{classname}}} {{^format}}{{dataType}}{{/format}}{{#format}}{{{format}}}{{/format}}
 
 // List of {{{name}}}